Some of the things I have noticed that have disappeared on our roads in the last 30 years...
Keep Left, Pass Right -
I find that it is often MUCH faster to stay in the extreme left lane when travelling on a multi-lane highway - it is virtually empty as all the other lanes to the right are either taken up by three HGV's (or Hyundai H-100 or Kia K-2500 bakkies) doing 80.25, 80.50 & 80.75 km/h, all trying to overtake each other on an uphill, or the lanes to the right are filled by hordes of SUV's, bakkies and German luxury saloons / hatchbacks all doing the NASCAR Indianapolis 500 multi-lane slalom, hopping constantly from lane to lane at 140 km/h (or more), only to arrive ONE car ahead of you by the traffic lights at the end of the off-ramp...
Using your indicators to signal your INTENTION to change lanes when it is clear to do so -
NOT putting them on for three flashes (or NOT at all) AS they veer across, 1 m in front of your bonnet, to suddenly change lanes...
Sun Down, Lights On -
I was taught to turn on my dipped beam headlights (NOT just park lights - they're for PARKING & NOT driving) half an hour BEFORE sunset, and to also keep them on for half an hour AFTER sunrise - as that is when the sun's rays are at their most oblique & the dazzle / glare from the sun reduces your ability to see other vehicles around you, especially if you have a dirty windscreen...
Using your cell-phone when driving -
I keep my phone in my pocket & ignore any calls or notifications when driving - my focus is entirely on what's happening through the BIG screen in front of me - unlike MANY motorists who are MORE focused on the LITTLE screen in their hand - or even worse, in their lap - and only look up every 5 to 10 seconds to see what's happening through their BIG screen - you can travel QUITE far in 5-10 seconds when doing 120km/h & the excrement unexpectedly hits the propeller directly in front of you...
Also, for those who JUST have to use their phone when driving (because they're VERY important & entitled) - DO NOT HOLD IT IN FRONT YOUR FACE ON SPEAKER when having a conversation - and veer between the white lines of your lane - or cross over them into another lane, when most modern cars - even a Renault Kwid or Hyundai i10 / Kia Picanto have Bluetooth (and Android Auto / Apple CarPlay) with hands-free connectivity - pair your device with the infotainment system and utilise that capability - FFS!
Following Distance - the 2-Second Rule -
This is meant to provide you with sufficient space in front of you to take avoiding action & brake if the traffic in front of you suddenly slows down - or stops completely... it is NOT there (take note all of the minibus drivers, as well as the drivers of the afore-mentioned SUV's, bakkies and German luxury saloons / hatchbacks) for them to veer across in front of your bonnet & squeeze into your lane - forcing you to slow down to reinstate that 2-second gap, only for the process to be repeated ad infintum by the a$$h0le drivers during your journey to your destination...
There are many other infringements I could mention - but it's already past my 22h00 weekday curfew at Shady Pines - & matron is about to do the rounds and give us our bed time Milo (or Horlicks) & medication (half a Viagra tablet - it has a dual purpose - it stops you rolling over & falling out of bed if you are restless & 'toss & turn' (pun intended) - and it also prevents you from peeing on your slippers when you wake up at 03h00 to go & take a leak...
Drive Safe & Stay Alert on the Roads - your life DOES depend on it...